assign a random number to the variable-CodePudding

Normally, I may use the following expression to define a variable in bash as the number

var='3'

How could I associate the variable with the random value, e.g. from 1 to 6, which could be assigned each time in the for loop:

for var ...; do
 print $var
done

Assuming that in each iteration, the var should be randomly selected from 1 to 6.

CodePudding user response：

I'm not sure if your question is about generating the random number

$ echo $(( RANDOM % 6   1 ))
4  # results may vary

or getting a sequence of random numbers. A C-style for loop would probably be simplest.

# Roll a 6-sided dice 5 times.
for ((n=0; n<5; n  , var=RANDOM%6 1)); do
   echo $var
done

The third expression makes use of the , operator, so that both n and var=RANDOM%6 1 are evaluated following each execution of the body of the loop.

CodePudding user response：

There is no need for for loop actually, you can do it by using RANDOM. If we take your example into consideration; To create random number between 1 and 6, you can use something like;

$(( ( $RANDOM % 6 )   1))

You can try it with;

random_number=$(( ( $RANDOM % 6 )   1)); echo $random_number